It's All About Relationship Building in "The Fortification Implementation”

1. "The Fortification Implementation"

When Sheldon and Amy build a blanket fort, they come to major crossroads in their relationship. Also, Wolowitz meets the half-brother he never knew he had, and when Penny is invited to appear on Wil Wheaton's podcast, she and Leonard have a huge, on-air argument, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Jim Parsons, Johnny Galecki, Simon Helberg and Kunal Nayyar Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
It's a big day for Howard

2. It's a big day for Howard

Wolowitz meets the half-brother he never knew he had, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Simon Helberg, Melissa Rauch and Kunal Nayyar Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Wil Wheaton's podcast

3. Wil Wheaton's podcast

When Penny (Kaley Cuoco-Sweeting, left) is invited to appear on Wil Wheaton's (pictured right) podcast, she and Leonard have a huge, on-air argument, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
What's the latest with Shamy?

4. What's the latest with Shamy?

When Sheldon (Jim Parsons, left) and Amy (Mayim Bialik, right) build a blanket fort, they come to major crossroads in their relationship, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Penny and a podcast

5. Penny and a podcast

When Penny (Kaley Cuoco-Sweeting, center) is invited to appear on Wil Wheaton's (pictured right) podcast, she and Leonard (Johnny Galecki, left) have a huge, on-air argument, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
A moment between brothers

6. A moment between brothers

Wolowitz meets the half-brother he never knew he had, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Kunal Nayyar, Simon Helberg, Matt Bennett and Melissa Rauch Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Another Wolowitz?

7. Another Wolowitz?

Wolowitz meets the half-brother he never knew he had, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Kunal Nayyar, Simon Helberg, Matt Bennett and Melissa Rauch Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Relationship building

8. Relationship building

When Sheldon (Jim Parsons, left) and Amy (Mayim Bialik, right) build a blanket fort, they come to major crossroads in their relationship, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
The biggest surprise

9. The biggest surprise

Wolowitz meets the half-brother he never knew he had, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Kunal Nayyar, Simon Helberg, Matt Bennett and Melissa Rauch Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Brothers

10. Brothers

Wolowitz meets the half-brother he never knew he had, on THE BIG BANG THEORY, Thursday, April 9 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Pictured left to right: Simon Helberg and Matt Bennett Photo: Sonja Flemming/CBS ©2015 CBS Broadcasting, Inc. All Rights Reserved
Kevin Smith says hello from the Big Bang set

11. Kevin Smith says hello from the Big Bang set

In this episode, Penny gets an offer to audition for a movie from Director Kevin Smith (pictured above to the right of Leonard). This behind-the-scenes snapshot shows Kevin enjoying his time on set, who is featured in the episode through a voice-over.